Merge pull request 'gradle.properties：去掉未生效的 MCP 映射设置' (#3) from cleanup/drop-unused-mappings-props into main

Reviewed-on: https://git.nest.potatolab.uk:8443/TDLM/thaumicadditions/pulls/3

gradle.properties

@@ -4,9 +4,6 @@ modGroup = com.pengu.thaumcraft
 modVersion = 0.41
 minecraftVersion = 1.7.10
 forgeVersion = 10.13.4.1614
-channel = stable
-mappingsVersion = 12
-remoteMappings = https\://raw.githubusercontent.com/MinecraftForge/FML/1.7.10/conf/
 enableModernJavaSyntax = false
 enableGenericInjection = false
 usesMixins = false