Remove redundant base FieldMask handler now that both converters intercept it

Author: andrewparmet

common/src/main/java/dev/cel/common/values/BaseProtoCelValueConverter.java

@@ -17,8 +17,6 @@
 import static com.google.common.collect.ImmutableList.toImmutableList;
 import static com.google.common.collect.ImmutableMap.toImmutableMap;
 
-import com.google.common.base.CaseFormat;
-import com.google.common.base.Joiner;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
@@ -29,7 +27,6 @@
 import com.google.protobuf.BytesValue;
 import com.google.protobuf.DoubleValue;
 import com.google.protobuf.Duration;
-import com.google.protobuf.FieldMask;
 import com.google.protobuf.FloatValue;
 import com.google.protobuf.Int32Value;
 import com.google.protobuf.Int64Value;
@@ -44,8 +41,6 @@
 import dev.cel.common.annotations.Internal;
 import dev.cel.common.internal.ProtoTimeUtils;
 import dev.cel.common.internal.WellKnownProto;
-import java.util.ArrayList;
-import java.util.List;
 
 /**
  * {@code BaseProtoCelValueConverter} contains the common logic for converting between native Java
@@ -103,15 +98,6 @@ protected Object fromWellKnownProto(MessageLiteOrBuilder message, WellKnownProto
         return UnsignedLong.valueOf(((UInt32Value) message).getValue());
       case UINT64_VALUE:
         return UnsignedLong.fromLongBits(((UInt64Value) message).getValue());
-      case FIELD_MASK:
-        FieldMask fieldMask = (FieldMask) message;
-        List<String> paths = new ArrayList<>(fieldMask.getPathsCount());
-        for (String path : fieldMask.getPathsList()) {
-          if (!path.isEmpty()) {
-            paths.add(CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL, path));
-          }
-        }
-        return normalizePrimitive(Joiner.on(",").join(paths));
       case EMPTY:
         return ImmutableMap.of();
       default: