Fix NON_EXHAUSTIVE_WHEN_STATEMENT warnings in project code

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirDeclarationInspector.kt

@@ -58,6 +58,7 @@ interface FirDeclarationPresenter {
             is ConeKotlinType -> {
                 appendRepresentation(it)
             }
+            is ConeKotlinTypeConflictingProjection -> {}
         }
     }
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirConflictsChecker.kt

@@ -197,6 +197,7 @@ object FirConflictsChecker : FirBasicDeclarationChecker() {
                             }
                     }
                 }
+                else -> {}
             }
             if (declarationName != null) {
                 session.lookupTracker?.recordLookup(

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirInlineClassDeclarationChecker.kt

@@ -130,6 +130,7 @@ object FirInlineClassDeclarationChecker : FirRegularClassChecker() {
                         }
                     }
                 }
+                else -> {}
             }
         }
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirNestedClassChecker.kt

@@ -37,6 +37,7 @@ object FirNestedClassChecker : FirRegularClassChecker() {
                     reporter.reportOn(declaration.source, NESTED_CLASS_NOT_ALLOWED, declaration.description, context)
                 }
             }
+            else -> {}
         }
     }
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirProjectionRelationChecker.kt

@@ -39,6 +39,7 @@ object FirProjectionRelationChecker : FirBasicDeclarationChecker() {
             }
             is FirTypeAlias ->
                 checkTypeRef(declaration.expandedTypeRef, context, reporter)
+            else -> {}
         }
     }
 

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirReturnAllowedChecker.kt

@@ -48,6 +48,7 @@ object FirReturnAllowedChecker : FirReturnExpressionChecker() {
                 }
                 is FirProperty -> if (!containingDeclaration.isLocal) return false
                 is FirValueParameter -> return true
+                else -> {}
             }
         }
         return true