Removed mixin refmap as it is no longer needed.

build.gradle

@@ -30,7 +30,7 @@ java {
 }
 
 minecraft {
-    mappings channel: mapping_channel, version: "$mapping_version-$minecraft_version"
+    mappings channel: mapping_channel, version: "$mapping_version"
 
     copyIdeResources = true
     // generateRunFolders = true
@@ -72,8 +72,6 @@ minecraft {
 }
 
 mixin {
-    add sourceSets.main, "${mod_id}.refmap.json"
-
     config "${mod_id}.mixins.json"
 }
 

gradle.properties

@@ -17,4 +17,4 @@ forge_version_range=[47,)
 loader_version_range=[47,)
 
 mapping_channel=parchment
-mapping_version=2023.09.03
+mapping_version=2023.09.03-1.20.1

src/main/resources/wildflowers_backport.mixins.json

@@ -3,7 +3,6 @@
   "minVersion": "0.8",
   "package": "dev.micle.wildflowers_backport.mixin",
   "compatibilityLevel": "JAVA_8",
-  "refmap": "firefly_bush_backport.refmap.json",
   "mixins": [
     "OctahedralGroupAccessor",
     "VoxelShapeAccessor",