Remove obsolete mental manifest. Remove Quadraphonics submodule (v0.6) due to file name issues in repo.

.gitmodules

@@ -283,9 +283,6 @@
 [submodule "repos/Edge"]
 	path = repos/Edge
 	url = https://github.com/Edge-Modules/Edge.git
-[submodule "repos/Quadraphonics"]
-	path = repos/Quadraphonics
-	url = https://github.com/KoreTeknology/Quadraphonic-Plugins-for-VCV-Rack.git
 [submodule "repos/UnforgettableLuncheon"]
 	path = repos/UnforgettableLuncheon
 	url = https://github.com/johnnymurf/Unforgettable-Luncheon.git

manifests/mental.json

@@ -1,10 +0,0 @@
-{
-  "name": "Strum's Mental Modules",
-  "author": "Strum",
-  "license": "BSD-3-Clause",
-  "manualUrl": "https://github.com/Strum/Strums_Mental_VCV_Modules/wiki/Mental-Modules-WIKI",
-  "sourceUrl": "https://github.com/Strum/Strums_Mental_VCV_Modules",
-  "pluginUrl": "https://github.com/Strum/Strums_Mental_VCV_Modules/wiki/Mental-Modules-WIKI",
-  "slug": "mental",
-  "version": "0.6.3"
-}

repos/Quadraphonics

@@ -1 +0,0 @@
-Subproject commit 9a4341c50b36341b855ecc427c57644a02e3d07f