lisp/ox-texinfo.el: Remove redundant `:group`s

lisp/ox-texinfo.el

@@ -147,12 +147,10 @@
   "Default document encoding for Texinfo output.
 
 If nil it will default to `buffer-file-coding-system'."
-  :group 'org-export-texinfo
   :type 'coding-system)
 
 (defcustom org-texinfo-default-class "info"
   "The default Texinfo class."
-  :group 'org-export-texinfo
   :type '(string :tag "Texinfo class"))
 
 (defcustom org-texinfo-classes
@@ -205,7 +203,6 @@ The sectioning structure of the class is given by the elements
 following the header string.  For each sectioning level, a number
 of strings is specified.  A %s formatter is mandatory in each
 section string and will be replaced by the title of the section."
-  :group 'org-export-texinfo
   :version "27.1"
   :package-version '(Org . "9.2")
   :type '(repeat
@@ -233,7 +230,6 @@ TEXT      the main headline text (string).
 TAGS      the tags as a list of strings (list of strings or nil).
 
 The function result will be used in the section format string."
-  :group 'org-export-texinfo
   :type 'function
   :version "26.1"
   :package-version '(Org . "8.3"))
@@ -244,38 +240,32 @@ The function result will be used in the section format string."
   "Column at which to start the description in the node listings.
 If a node title is greater than this length, the description will
 be placed after the end of the title."
-  :group 'org-export-texinfo
   :type 'integer)
 
 ;;;; Timestamps
 
 (defcustom org-texinfo-active-timestamp-format "@emph{%s}"
   "A printf format string to be applied to active timestamps."
-  :group 'org-export-texinfo
   :type 'string)
 
 (defcustom org-texinfo-inactive-timestamp-format "@emph{%s}"
   "A printf format string to be applied to inactive timestamps."
-  :group 'org-export-texinfo
   :type 'string)
 
 (defcustom org-texinfo-diary-timestamp-format "@emph{%s}"
   "A printf format string to be applied to diary timestamps."
-  :group 'org-export-texinfo
   :type 'string)
 
 ;;;; Links
 
 (defcustom org-texinfo-link-with-unknown-path-format "@indicateurl{%s}"
   "Format string for links with unknown path type."
-  :group 'org-export-texinfo
   :type 'string)
 
 ;;;; Tables
 
 (defcustom org-texinfo-tables-verbatim nil
   "When non-nil, tables are exported verbatim."
-  :group 'org-export-texinfo
   :type 'boolean)
 
 (defcustom org-texinfo-table-scientific-notation nil
@@ -285,7 +275,6 @@ The format should have \"%s\" twice, for mantissa and exponent
 \(i.e. \"%s\\\\times10^{%s}\").
 
 When nil, no transformation is made."
-  :group 'org-export-texinfo
   :type '(choice
 	  (string :tag "Format string")
 	  (const :tag "No formatting" nil)))
@@ -297,7 +286,6 @@ This should an indicating command, e.g., \"@code\", \"@kbd\" or
 \"@samp\".
 
 It can be overridden locally using the \":indic\" attribute."
-  :group 'org-export-texinfo
   :type 'string
   :version "26.1"
   :package-version '(Org . "9.1")
@@ -323,7 +311,6 @@ to typeset and protects special characters.
 
 When no association is found for a given markup, text is returned
 as-is."
-  :group 'org-export-texinfo
   :version "26.1"
   :package-version '(Org . "9.1")
   :type 'alist
@@ -341,7 +328,6 @@ The function must accept two parameters:
 The function should return the string to be exported.
 
 The default function simply returns the value of CONTENTS."
-  :group 'org-export-texinfo
   :version "24.4"
   :package-version '(Org . "8.2")
   :type 'function)
@@ -361,7 +347,6 @@ The function must accept six parameters:
   CONTENTS  the contents of the inlinetask, as a string.
 
 The function should return the string to be exported."
-  :group 'org-export-texinfo
   :type 'function)
 
 ;;;; LaTeX
@@ -374,7 +359,6 @@ fragments as Texinfo \"@displaymath\" and \"@math\" commands
 respectively.  Alternatively, when set to `detect', the exporter
 does so only if the installed version of Texinfo supports the
 necessary commands."
-  :group 'org-export-texinfo
   :package-version '(Org . "9.6")
   :type '(choice
           (const :tag "Detect" detect)
@@ -391,7 +375,6 @@ body but is followed by another item, then the second item is
 transcoded to `@itemx'.  See info node `(org)Plain lists in
 Texinfo export' for how to enable this for individual lists."
   :package-version '(Org . "9.6")
-  :group 'org-export-texinfo
   :type 'boolean
   :safe t)
 
@@ -406,7 +389,6 @@ relative file name, %F by the absolute file name, %b by the file
 base name (i.e. without directory and extension parts), %o by the
 base directory of the file and %O by the absolute file name of
 the output file."
-  :group 'org-export-texinfo
   :version "26.1"
   :package-version '(Org . "9.1")
   :type '(repeat :tag "Shell command sequence"
@@ -417,7 +399,6 @@ the output file."
   "The list of file extensions to consider as Texinfo logfiles.
 The logfiles will be remove if `org-texinfo-remove-logfiles' is
 non-nil."
-  :group 'org-export-texinfo
   :type '(repeat (string :tag "Extension")))
 
 (defcustom org-texinfo-remove-logfiles t
@@ -1591,7 +1572,7 @@ information."
   (concat
    "@noindent"
    (mapconcat
-    'identity
+    #'identity
     (delq nil
 	  (list
 	   (let ((closed (org-element-property :closed planning)))