Update deferred_shading.vs for GLES3

examples/shaders/resources/shaders/glsl100/deferred_shading.vs

@@ -2,8 +2,8 @@
 
 precision highp float;
 
-layout (location = 0) in vec3 vertexPosition;
-layout (location = 1) in vec2 vertexTexCoord;
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
 
 out vec2 texCoord;