Clean up unused shader variables.

res/shaders/imesh_point.frag

@@ -9,8 +9,6 @@ uniform vec4 color;
 uniform float pixel;
 uniform float width;
 
-varying vec2 fragLoc;
-
 void main() {
     // Rectangular points
     gl_FragColor = color;

res/shaders/imesh_point.vert

@@ -13,8 +13,6 @@ uniform mat4 projection;
 uniform float width;
 uniform float pixel;
 
-varying vec2 fragLoc;
-
 void main() {
     // get camera vectors from modelview matrix
     vec3 u = vec3(modelview[0].x, modelview[1].x, modelview[2].x);
@@ -30,9 +28,6 @@ void main() {
     vertex += ext * loc.x * normalize(u);
     vertex += ext * loc.y * normalize(v);
 
-    // write fragment location for calculating caps and antialiasing
-    fragLoc = loc;
-
     // transform resulting vertex with modelview and projection matrices
     gl_Position = projection * modelview * vec4(vertex, 1.0);
 }

src/render/gl3shader.cpp

@@ -926,8 +926,7 @@ void IndexedMeshRenderer::Init() {
     colShader.Init(
         "shaders/imesh.vert", "shaders/imesh.frag",
         {
-            { ATTRIB_POS, "pos" },
-            { ATTRIB_TEX, "tex" }
+            { ATTRIB_POS, "pos" }
         }
     );
     texShader.Init(