Remove Spek support from detekt-test-utils

[3flex]

It's been about 10 months since v1.20.0 was released and we deprecated Spek support. I think it's time to drop it completely.

For future readers, if you want to continue using the support that was provided by detekt, just use:

fun Root.setupKotlinEnvironment(additionalJavaSourceRootPath: Path? = null) {
    val wrapper by memoized(
        CachingMode.SCOPE,
        { createEnvironment(additionalJavaSourceRootPaths = listOfNotNull(additionalJavaSourceRootPath?.toFile())) },
        { it.dispose() }
    )

    // name is used for delegation
    @Suppress("UNUSED_VARIABLE")
    val env: KotlinCoreEnvironment by memoized(CachingMode.EACH_GROUP) { wrapper.env }
}

You'll need to tweak your imports but otherwise this should continue working for the foreseeable future.

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Generated by 🚫 dangerJS against 38f128c

[codecov]

Codecov Report

Merging #5785 (38f128c) into main (5d45cba) will increase coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #5785      +/-   ##
============================================
+ Coverage     84.48%   84.53%   +0.05%     
  Complexity     3743     3743              
============================================
  Files           546      546              
  Lines         12788    12780       -8     
  Branches       2230     2229       -1     
============================================
  Hits          10804    10804              
+ Misses          869      861       -8     
  Partials       1115     1115              

Impacted Files	Coverage Δ
...urbosch/detekt/rules/KotlinEnvironmentTestSetup.kt	75.00% <ø> (+21.42%)	⬆️

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[schalkms]

Good one!