Remove unused WriteCopyrightToFile gradle task

#KTI-758

compiler/fir/checkers/checkers-component-generator/build.gradle.kts

@@ -21,22 +21,13 @@ dependencies {
     implementation(project(":compiler:psi"))
 }
 
-val writeCopyright by task<tasks.WriteCopyrightToFile> {
-    outputFile.set(file("$buildDir/copyright/notice.txt"))
-    commented.set(true)
-}
-
 application {
     mainClass.set("org.jetbrains.kotlin.fir.checkers.generator.MainKt")
 }
 
-val processResources by tasks
-processResources.dependsOn(writeCopyright)
-
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("$buildDir/copyright")
     }
     "test" {}
 }

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

@@ -1,5 +1,3 @@
-import tasks.WriteCopyrightToFile
-
 plugins {
     kotlin("jvm")
     id("jps-compatible")
@@ -22,22 +20,13 @@ dependencies {
     runtimeOnly(commonDependency("org.jetbrains.intellij.deps:jdom"))
 }
 
-val writeCopyright by task<WriteCopyrightToFile> {
-    outputFile.set(file("$buildDir/copyright/notice.txt"))
-    commented.set(true)
-}
-
 application {
     mainClass.set("org.jetbrains.kotlin.fir.tree.generator.MainKt")
 }
 
-val processResources by tasks
-processResources.dependsOn(writeCopyright)
-
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("$buildDir/copyright")
     }
     "test" {}
 }

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

@@ -1,5 +1,3 @@
-import tasks.WriteCopyrightToFile
-
 plugins {
     kotlin("jvm")
     id("jps-compatible")
@@ -21,22 +19,13 @@ dependencies {
     runtimeOnly(commonDependency("org.jetbrains.intellij.deps:jdom"))
 }
 
-val writeCopyright by task<WriteCopyrightToFile> {
-    outputFile.set(file("$buildDir/copyright/notice.txt"))
-    commented.set(true)
-}
-
 application {
     mainClassName = "org.jetbrains.kotlin.ir.generator.MainKt"
 }
 
-val processResources by tasks
-processResources.dependsOn(writeCopyright)
-
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("$buildDir/copyright")
     }
     "test" {}
 }