Revert "use $VISUAL environment variable for plugins"

This reverts commit 9f3fbd93ce.

plugins/.nmv

@@ -16,7 +16,7 @@
 # Shell: bash
 # Author: KlzXS
 
-EDITOR="${VISUAL:-${EDITOR:-vi}}"
+EDITOR="${EDITOR:-vi}"
 TMPDIR="${TMPDIR:-/tmp}"
 INCLUDE_HIDDEN="${INCLUDE_HIDDEN:-0}"
 VERBOSE="${VERBOSE:-0}"

plugins/bulknew

@@ -9,7 +9,7 @@
 # Shell: POSIX compliant
 # Author: KlzXS
 
-EDITOR="${VISUAL:-${EDITOR:-vi}}"
+EDITOR="${EDITOR:-vi}"
 TMPDIR="${TMPDIR:-/tmp}"
 
 printf "'f'ile / 'd'ir? "

plugins/dups

@@ -14,7 +14,7 @@
 # If the size of a file has more that $size_digits digits the file will be misplaced
 # 12 digits fit files up to 931GiB
 
-EDITOR="${VISUAL:-${EDITOR:-vi}}"
+EDITOR="${EDITOR:-vi}"
 TMPDIR="${TMPDIR:-/tmp}"
 
 size_digits=12

plugins/suedit

@@ -5,7 +5,7 @@
 # Shell: POSIX compliant
 # Author: Anna Arad
 
-EDITOR="${VISUAL:-${EDITOR:-vi}}"
+EDITOR="${EDITOR:-vim}"
 
 is_cmd_exists () {
     which "$1" > /dev/null 2>&1