Duplicate calls to setters in gax-java/gax-grpc/src/test/java/com/google/api/gax/grpc/TimeoutTest

[cushon]

There are some duplicated calls to setter methods in gax-java/gax-grpc/src/test/java/com/google/api/gax/grpc/TimeoutTest.java:

sdk-platform-java/gax-java/gax-grpc/src/test/java/com/google/api/gax/grpc/TimeoutTest.java

Lines 201 to 202 in 3fbcdeb

	.setRpcTimeoutMultiplier(1.0)
	.setRpcTimeoutMultiplier(1.0)

The calls are redundant, can can be removed.

These were noticed by https://errorprone.info/bugpattern/RedundantSetterCall