Remove tweakz shader

src/Preload/Render.hs

@@ -133,8 +133,6 @@ preloadRender = do
         makeShader "dualTwoD/character" [vert, frag] [3, 4, 2] pmTriangles
             >>= _1 (vaddTextureNoFilter "data/texture/charMap.png")
     -- this should really be a 2d texture array
-    basicTweakZShad <- makeShader "dualTwoD/basicTweakZ" [vert, frag] [4, 4] pmTriangles
-    -- texture shaders, no textures attached
 
     screentexturevbo <- mglCreate glCreateBuffers
     withArray (concat cornerList) $ \ptr ->
@@ -196,12 +194,11 @@ preloadRender = do
     -- reset to default framebuffer, ready for drawing direct to screen
     glBindFramebuffer GL_FRAMEBUFFER 0
 
-    shadV <- MV.new 6
+    shadV <- MV.new 5
     zipWithM_
         (MV.write shadV)
-        [0 .. 5]
+        [0 .. 4]
         [ bslist -- note the ordering is very important
-        , basicTweakZShad -- ShadNum
         , bezierQuadShader
         , cslist
         , aslist