tmuxPlugins: removed phony dependencies attribute

The `dependencies` attribute in mkTmuxPlugin has deceived contributors
into thinking it makes packages available to the plugin at runtime.

To avoid further confusion the attribute is removed and plugins that
used it fixed.

Example PRs where `dependencies` has confused.
- https://github.com/NixOS/nixpkgs/pull/113726#discussion_r591146399
- https://github.com/NixOS/nixpkgs/pull/95275/files#r522817362

pkgs/misc/tmux-plugins/default.nix

@@ -24,10 +24,11 @@ let
     preInstall ? "",
     postInstall ? "",
     path ? lib.getName pluginName,
-    dependencies ? [],
     ...
   }:
-    addRtp "${rtpPath}/${path}" rtpFilePath a (stdenv.mkDerivation (a // {
+    if lib.hasAttr "dependencies" a then
+      throw "dependencies attribute is obselete. see NixOS/nixpkgs#118034" # added 2021-04-01
+    else addRtp "${rtpPath}/${path}" rtpFilePath a (stdenv.mkDerivation (a // {
       pname = namePrefix + pluginName;
 
       inherit pluginName unpackPhase configurePhase buildPhase addonInfo preInstall postInstall;
@@ -44,8 +45,6 @@ let
 
         runHook postInstall
       '';
-
-      dependencies = [ pkgs.bash ] ++ dependencies;
     }));
 
 in rec {
@@ -73,7 +72,6 @@ in rec {
       rev = "26eb5ffce0b559d682b9f98c8d4b6c370ecb639b";
       sha256 = "1glwa89bv2r92qz579a49prk3jf612cpd5hw46j4wfb35xhnj3ab";
     };
-    dependencies = [ resurrect ];
     meta = {
       homepage = "https://github.com/tmux-plugins/tmux-continuum";
       description = "continous saving of tmux environment";
@@ -156,7 +154,15 @@ in rec {
       sha256 = "0gp37m3d0irrsih96qv2yalvr1wmf1n64589d4qzyzq16lzyjcr0";
       fetchSubmodules = true;
     };
-    dependencies = [ pkgs.gawk ];
+    nativeBuildInputs = [ pkgs.makeWrapper ];
+    postInstall = ''
+      for f in config.sh tmux-fingers.sh setup-fingers-mode-bindings.sh; do
+      wrapProgram $target/scripts/$f \
+        --prefix PATH : ${with pkgs; lib.makeBinPath (
+          [ gawk ] ++ lib.optionals stdenv.isDarwin [ reattach-to-user-namespace ]
+        )}
+      done
+    '';
   };
 
   fpp = mkTmuxPlugin {
@@ -171,7 +177,6 @@ in rec {
     postInstall = ''
       sed -i -e 's|fpp |${pkgs.fpp}/bin/fpp |g' $target/fpp.tmux
     '';
-    dependencies = [ pkgs.fpp ];
   };
 
   fzf-tmux-url = mkTmuxPlugin {
@@ -211,8 +216,6 @@ in rec {
     postInstall = ''
       sed -i -e 's|ruby|${pkgs.ruby}/bin/ruby|g' $target/scripts/tmux-jump.sh
     '';
-    dependencies = [ pkgs.ruby ];
-
     meta = with lib; {
       homepage = "https://github.com/schasse/tmux-jump";
       description = "Vimium/Easymotion like navigation for tmux";
@@ -477,7 +480,7 @@ in rec {
       find $target -type f -print0 | xargs -0 sed -i -e 's|sed |${pkgs.gnused}/bin/sed |g'
       find $target -type f -print0 | xargs -0 sed -i -e 's|tput |${pkgs.ncurses}/bin/tput |g'
     '';
-     meta = {
+    meta = {
       homepage = "https://github.com/sainnhe/tmux-fzf";
       description = "Use fzf to manage your tmux work environment! ";
       longDescription =
@@ -510,7 +513,6 @@ in rec {
     postInstall = ''
       sed -i -e '14,20{s|urlview|${pkgs.urlview}/bin/urlview|g}' $target/urlview.tmux
     '';
-    dependencies = [ pkgs.urlview ];
   };
 
   vim-tmux-focus-events = mkTmuxPlugin {