This commit addresses 1243c641296e74a572a4f274df72a4cda60635c6 in intellij
In intellij they added registration of "com.intellij.psi.classFileDecompiler" in
`JavaCoreApplicationEnvironment`. And because the `KotlinCoreApplicationEnvironment` inherits
`JavaCoreApplicationEnvironment` we don't need to register this EP ourselves.
This commit fixes in 203 tests + 1.4.30 compiler:
```
java.lang.RuntimeException: Duplicate registration for EP 'com.intellij.psi.classFileDecompiler': first in com.intellij.openapi.extensions.DefaultPluginDescriptor@44f464d1, second in PluginDescriptor(name=org.jetbrains.kotlin, id=org.jetbrains.kotlin, path=/home/builduser/.m2/repository/org/jetbrains/kotlin/kotlin-compiler-for-ide/1.4.30-M1-30/kotlin-compiler-for-ide-1.4.30-M1-30.jar, version=1.2)
at com.intellij.openapi.components.ComponentManager.createError(ComponentManager.java:167)
at com.intellij.openapi.extensions.impl.ExtensionsAreaImpl.registerExtensionPoints(ExtensionsAreaImpl.java:262)
at com.intellij.ide.plugins.PluginManagerCore.registerExtensionPointAndExtensions(PluginManagerCore.java:1334)
...
```
Nikita Bobko
0d8cdb7bdb