Remove unnecessary constructor keyword intention (KT-29143)

#KT-29143 Fixed

compiler/psi/src/org/jetbrains/kotlin/psi/KtPrimaryConstructor.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.psi
 
 import com.intellij.lang.ASTNode
 import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiWhiteSpace
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.addRemoveModifier.addModifier
@@ -36,6 +37,13 @@ class KtPrimaryConstructor : KtConstructor<KtPrimaryConstructor> {
         return getConstructorKeyword() ?: addBefore(KtPsiFactory(this).createConstructorKeyword(), valueParameterList!!)
     }
 
+    fun removeRedundantConstructorKeywordAndSpace() {
+        getConstructorKeyword()?.delete()
+        if (prevSibling is PsiWhiteSpace) {
+            prevSibling.delete()
+        }
+    }
+
     override fun addModifier(modifier: KtModifierKeywordToken) {
         val modifierList = modifierList
         if (modifierList != null) {