Remove vestigial 'deps' and 'data' attributes from proto_lang_toolchain

RELNOTES: Remove vestigial 'deps' and 'data' attributes from proto_lang_toolchain
PiperOrigin-RevId: 192630723

src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java b/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java
index 4ce540e..335a4d9 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java
@@ -74,6 +74,8 @@
                     ImmutableList.<Class<? extends TransitiveInfoProvider>>of(FileProvider.class)))
 
         .advertiseProvider(ProtoLangToolchainProvider.class)
+        .removeAttribute("data")
+        .removeAttribute("deps")
         .build();
   }