Remove dependency of fir:tree:tree-generator on kotlin-reflect

This dependency was unused. It allows to avoid waiting for compiling
kotlin-reflect (which includes descriptors, deserialization, etc.)
before compiling FIR modules and thus improves total build time.

compiler/fir/tree/tree-generator/build.gradle.kts

@@ -26,7 +26,6 @@ dependencies {
     Platform[192].orHigher {
         runtimeOnly(intellijCoreDep()) { includeJars("jdom") }
     }
-    implementation(project(":kotlin-reflect"))
 }
 
 val writeCopyright by task<WriteCopyrightToFile> {