removed dependency on dynamic lightmap from meta pass.

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/LightweightPassMeta.hlsl

     float2 uv       : TEXCOORD0;
 };
 
-float4 MetaVertexPosition(float4 vertex, float2 uv1, float2 uv2, float4 lightmapST, float4 dynlightmapST)
+float4 MetaVertexPosition(float4 vertex, float2 uv1, float2 uv2, float4 lightmapST)
 {
     if (unity_MetaVertexControl.x)
     {
-        vertex.z = vertex.z > 0 ? 1.0e-4f : 0.0f;
-    }
-    if (unity_MetaVertexControl.y)
-    {
-        vertex.xy = uv2 * dynlightmapST.xy + dynlightmapST.zw;
-        // OpenGL right now needs to actually use incoming vertex position,
-        // so use it in a very dummy way
-        vertex.z = vertex.z > 0 ? 1.0e-4f : 0.0f;
+        vertex.z = vertex.z > 0 ? REAL_MIN : 0.0f;
     }
     return TransformWorldToHClip(vertex.xyz); // Need to transfer from world to clip compared to legacy
 }
 MetaVertexOuput LightweightVertexMeta(MetaVertexInput v)
 {
     MetaVertexOuput o;
-    o.pos = MetaVertexPosition(v.vertex, v.uv1.xy, v.uv2.xy, unity_LightmapST, unity_DynamicLightmapST);
-    o.uv = TRANSFORM_TEX(v.uv0, _MainTex);
+    o.pos = MetaVertexPosition(v.vertex, v.uv1.xy, v.uv2.xy, unity_LightmapST);
+    o.uv = TransformMainTextureCoord(v.uv0);
     return o;
 }