delete old unused shaders

shaders/text-atlas.f.glsl

@@ -1,12 +0,0 @@
-#version 330 core
-
-in vec2 TexCoords;
-in vec4 VertexColor;
-
-uniform sampler2D text;
-
-void main()
-{
-    float a = texture(text, TexCoords).r;
-    gl_FragColor = vec4(VertexColor.rgb, VertexColor.a*a);
-}

shaders/text-atlas.v.glsl

@@ -1,17 +0,0 @@
-#version 330 core
-
-layout (location = 0) in vec3 vertex;
-layout (location = 1) in vec2 tex_coord;
-layout (location = 2) in vec4 color;
-
-out vec2 TexCoords;
-out vec4 VertexColor;
-
-uniform mat4 projection;
-
-void main()
-{
-    gl_Position = projection * vec4(vertex, 1.0);
-    TexCoords   = tex_coord.xy;
-    VertexColor = color;
-}