Cleanup Kotlin dependencies in Kruth

I noticed we have some redundant declarations while looking into getting
the common source to access the commonized AssertionFailure(String?,
Error?) constructor, which is needed to pass a cause / stacktrace
through for Truth's failure messaging.

Test: ANDROIDX_PROJECTS=INFRAROGUE ./gradlew kruth:kruth:allTests --no-configuration-cache --no-build-cache -Pandroidx.enabled.kmp.target.platforms=+LINUX --rerun-tasks
Change-Id: I46915859befd8c055b938436575de27d378fa36e

kruth/kruth/build.gradle

@@ -47,7 +47,6 @@ androidXMultiplatform {
 
         commonTest {
             dependencies {
-                implementation(libs.kotlinTestCommon)
                 implementation(libs.kotlinTestAnnotationsCommon)
             }
         }
@@ -61,13 +60,6 @@ androidXMultiplatform {
             }
         }
 
-        jvmTest {
-            dependencies {
-                implementation(libs.kotlinStdlib)
-                implementation(libs.kotlinTest)
-            }
-        }
-
         if (macEnabled || linuxEnabled || nativeEnabled) {
             nativeMain {
                 dependsOn(commonMain)