Remove `org-substring-no-properties' and some redundant code

* org-macs.el (org-no-properties): Allow a new parameter
`restricted' to restrict the properties removal to those in
`org-rm-props'.  The default is now to remove all properties.

* org-compat.el (org-substring-no-properties): Remove unused
defun.

* org-remember.el (org-remember-apply-template): Remove
redundant removal of text properties.
(org-remember-apply-template): Use `org-no-properties'.

* org-capture.el (org-capture-fill-template): Remove redundant
removal of text properties.
(org-capture-fill-template): Use `org-no-properties'.

* org-gnus.el (org-gnus-open, org-gnus-follow-link): Use
`org-no-properties'.

lisp/org-capture.el

@@ -1299,8 +1299,7 @@ Lisp programs can force the template by setting KEYS to a string."
 The template may still contain \"%?\" for cursor positioning."
   (setq template (or template (org-capture-get :template)))
   (when (stringp initial)
-    (setq initial (org-no-properties initial))
-    (remove-text-properties 0 (length initial) '(read-only t) initial))
+    (setq initial (org-no-properties initial)))
   (let* ((buffer (org-capture-get :buffer))
 	 (file (buffer-file-name (or (buffer-base-buffer buffer) buffer)))
 	 (ct (org-capture-get :default-time))
@@ -1344,7 +1343,7 @@ The template may still contain \"%?\" for cursor positioning."
 		v-a))
 	 (v-n user-full-name)
 	 (v-k (if (marker-buffer org-clock-marker)
-		  (org-substring-no-properties org-clock-heading)))
+		  (org-no-properties org-clock-heading)))
 	 (v-K (if (marker-buffer org-clock-marker)
 		  (org-make-link-string
 		   (buffer-file-name (marker-buffer org-clock-marker))
@@ -1477,7 +1476,7 @@ The template may still contain \"%?\" for cursor positioning."
 						   '(clipboards . 1)
 						   (car clipboards))))))
 	   ((equal char "p")
-	    (org-set-property (org-substring-no-properties prompt) nil))
+	    (org-set-property (org-no-properties prompt) nil))
 	   (char
 	    ;; These are the date/time related ones
 	    (setq org-time-was-given (equal (upcase char) char))

lisp/org-compat.el

@@ -331,11 +331,6 @@ Works on both Emacs and XEmacs."
 	string)
     (apply 'propertize string properties)))
 
-(defun org-substring-no-properties (string &optional from to)
-  (if (featurep 'xemacs)
-      (org-no-properties (substring string (or from 0) to))
-    (substring-no-properties string from to)))
-
 (defmacro org-find-library-dir (library)
   `(file-name-directory (locate-library ,library)))
 

lisp/org-gnus.el

@@ -233,9 +233,9 @@ If `org-store-link' was called with a prefix arg the meaning of
     (setq group (match-string 1 path)
 	  article (match-string 3 path))
     (when group
-      (setq group (org-substring-no-properties group)))
+      (setq group (org-no-properties group)))
     (when article
-      (setq article (org-substring-no-properties article)))
+      (setq article (org-no-properties article)))
     (org-gnus-follow-link group article)))
 
 (defun org-gnus-follow-link (&optional group article)
@@ -244,9 +244,9 @@ If `org-store-link' was called with a prefix arg the meaning of
   (funcall (cdr (assq 'gnus org-link-frame-setup)))
   (if gnus-other-frame-object (select-frame gnus-other-frame-object))
   (when group
-    (setq group (org-substring-no-properties group)))
+    (setq group (org-no-properties group)))
   (when article
-    (setq article (org-substring-no-properties article)))
+    (setq article (org-no-properties article)))
   (cond ((and group article)
 	 (gnus-activate-group group)
 	 (condition-case nil

lisp/org-macs.el

@@ -239,10 +239,15 @@ We use a macro so that the test can happen at compilation time."
 	s)
     (match-string-no-properties num string)))
 
-(defsubst org-no-properties (s)
+(defsubst org-no-properties (s &optional restricted)
+  "Remove all text properties from string S.
+When RESTRICTED is non-nil, only remove the properties listed
+in `org-rm-props'."
   (if (fboundp 'set-text-properties)
       (set-text-properties 0 (length s) nil s)
-    (remove-text-properties 0 (length s) org-rm-props s))
+    (if restricted
+	(remove-text-properties 0 (length s) org-rm-props s)
+      (set-text-properties 0 (length s) nil s)))
   s)
 
 (defsubst org-get-alist-option (option key)

lisp/org-remember.el

@@ -398,8 +398,7 @@ RET at beg-of-buf -> Append to file as level 2 headline
 This function should be placed into `remember-mode-hook' and in fact requires
 to be run from that hook to function properly."
   (when (and (boundp 'initial) (stringp initial))
-    (setq initial (org-no-properties initial))
-    (remove-text-properties 0 (length initial) '(read-only t) initial))
+    (setq initial (org-no-properties initial)))
   (if org-remember-templates
       (let* ((entry (org-select-remember-template use-char))
 	     (ct (or org-overriding-default-time (org-current-time)))
@@ -446,7 +445,7 @@ to be run from that hook to function properly."
 		    v-a))
 	     (v-n user-full-name)
 	     (v-k (if (marker-buffer org-clock-marker)
-		      (org-substring-no-properties org-clock-heading)))
+		      (org-no-properties org-clock-heading)))
 	     (v-K (if (marker-buffer org-clock-marker)
 		      (org-make-link-string
 		       (buffer-file-name (marker-buffer org-clock-marker))
@@ -598,7 +597,7 @@ to be run from that hook to function properly."
 						     (car clipboards))))))
 	     ((equal char "p")
 	      (let*
-		  ((prop (org-substring-no-properties prompt))
+		  ((prop (org-no-properties prompt))
 		   (pall (concat prop "_ALL"))
 		   (allowed
 		    (with-current-buffer