Code cleanup: get rid of unnecessary !! / ?. / as

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt

@@ -309,7 +309,7 @@ public class KotlinCoreEnvironment private constructor(
                 if (ourApplicationEnvironment == null) return
                 val environment = ourApplicationEnvironment
                 ourApplicationEnvironment = null
-                Disposer.dispose(environment!!.getParentDisposable())
+                Disposer.dispose(environment.getParentDisposable())
             }
         }
 

compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt

@@ -359,7 +359,7 @@ class JavaSyntheticPropertiesScope(storageManager: StorageManager, private val l
             }
             val classParametersSubstitutor = TypeSubstitutor.create(substitutionMap)
 
-            descriptor.getMethod = getMethod.substitute(classParametersSubstitutor)!!
+            descriptor.getMethod = getMethod.substitute(classParametersSubstitutor)
             descriptor.setMethod = setMethod?.substitute(classParametersSubstitutor)
             return descriptor
         }

compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/SamAdapterFunctionsScope.kt

@@ -199,7 +199,7 @@ class SamAdapterFunctionsScope(storageManager: StorageManager) : BaseImportingSc
             }
 
             val sourceFunctionSubstitutor = TypeSubstitutor.create(substitutionMap)
-            descriptor.sourceFunction = original.sourceFunction.substitute(sourceFunctionSubstitutor)!!
+            descriptor.sourceFunction = original.sourceFunction.substitute(sourceFunctionSubstitutor)
 
             return descriptor
         }

compiler/frontend/src/org/jetbrains/kotlin/psi/psiUtil/psiUtils.kt

@@ -98,12 +98,12 @@ public fun PsiElement.getParentOfTypesAndPredicate<T : PsiElement>(
     while (element != null) {
         @Suppress("UNCHECKED_CAST")
         when {
-            (parentClasses.isEmpty() || parentClasses.any { parentClass -> parentClass.isInstance(element) }) && predicate(element!! as T) ->
-                return element as T
+            (parentClasses.isEmpty() || parentClasses.any { parentClass -> parentClass.isInstance(element) }) && predicate(element as T) ->
+                return element
             element is PsiFile ->
                 return null
             else ->
-                element = element!!.getParent()
+                element = element.getParent()
         }
     }
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tasks/synthesizedInvokes.kt

@@ -52,7 +52,7 @@ fun createSynthesizedInvokes(functions: Collection<FunctionDescriptor>): Collect
             fakeOverride
         }
 
-        result.add(synthesized.substitute(TypeSubstitutor.create(invoke.getDispatchReceiverParameter()!!.getType()))!!)
+        result.add(synthesized.substitute(TypeSubstitutor.create(invoke.getDispatchReceiverParameter()!!.getType())))
     }
 
     return result

compiler/tests/org/jetbrains/kotlin/checkers/LazyOperationsLog.kt

@@ -189,7 +189,7 @@ class LazyOperationsLog(
                 }.appendQuoted()
             }
             o is ResolutionCandidate<*> -> DescriptorRenderer.COMPACT.render(o.getDescriptor()).appendQuoted()
-            o is ResolutionTaskHolder<*, *> -> o.field<BasicCallResolutionContext>("basicCallResolutionContext").call.getCallElement().getDebugText()?.appendQuoted()
+            o is ResolutionTaskHolder<*, *> -> o.field<BasicCallResolutionContext>("basicCallResolutionContext").call.getCallElement().getDebugText().appendQuoted()
         }
         return sb.toString()
     }

compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractCompileKotlinAgainstInlineKotlinTest.kt

@@ -54,10 +54,10 @@ public abstract class AbstractCompileKotlinAgainstInlineKotlinTest : AbstractCom
         catch (e: Throwable) {
             var result = ""
             if (factory1 != null) {
-                result += "FIRST: \n\n" + factory1!!.createText()
+                result += "FIRST: \n\n" + factory1.createText()
             }
             if (factory2 != null) {
-                result += "\n\nSECOND: \n\n" + factory2!!.createText()
+                result += "\n\nSECOND: \n\n" + factory2.createText()
             }
             System.out.println(result)
             throw e