Remove duplicate dependencies

[picimako]

There were two libraries whose dependency entries in build.gradle were duplicated. Both duplicates are removed.

References

None.

Submitter checklist

• The PR request is well described and justified, including the body and the references
• The PR title represents the desired changelog entry
• The repository's code style is followed (see the contributing guide)
• Test coverage that demonstrates that the change works as expected
• For new features, there's necessary documentation in this pull request or in a subsequent PR to wiremock.org

[oleg-nenashev]

Test failure is unrelated

WireMockJUnitRuleTest > com.github.tomakehurst.wiremock.WireMockJUnitRuleTest$PortNumbers > reportedPortIsAsConfiguredInRule FAILED
    com.github.tomakehurst.wiremock.common.FatalStartupException: java.lang.RuntimeException: java.io.IOException: Failed to bind to /0.0.0.0:33175
        at app//com.github.tomakehurst.wiremock.WireMockServer.start(WireMockServer.java:160)
        at app//com.github.tomakehurst.wiremock.junit.WireMockRule$1.evaluate(WireMockRule.java:57)
        at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at app//org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
        at app//org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
        at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
        at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
        at app//org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
        at app//org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
        at app//org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
        at app//org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
        at app//org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
        at app//com.github.tomakehurst.wiremock.junit.WireMockClassRule$1.evaluate(WireMockClassRule.java:75)
        at app//org.junit.rules.RunRules.evaluate(RunRules.java:20)