FIR: Remove FirQualifiedAcces.safe in non-generated code

^KT-38444 In Progress

compiler/fir/raw-fir/fir-common/src/org/jetbrains/kotlin/fir/builder/BaseFirBuilder.kt

@@ -473,7 +473,6 @@ abstract class BaseFirBuilder<T>(val baseSession: FirSession, val context: Conte
                     val firMemberAccess = left.convertQualified()
                     return if (firMemberAccess != null) {
                         explicitReceiver = firMemberAccess.explicitReceiver
-                        safe = firMemberAccess.safe
                         firMemberAccess.calleeReference
                     } else {
                         buildErrorNamedReference {
@@ -546,7 +545,6 @@ abstract class BaseFirBuilder<T>(val baseSession: FirSession, val context: Conte
 
         return buildVariableAssignment {
             source = baseSource
-            safe = false
             rValue = value
             calleeReference = initializeLValue(this@generateAssignment) { convert() as? FirQualifiedAccess }
         }
@@ -562,7 +560,6 @@ abstract class BaseFirBuilder<T>(val baseSession: FirSession, val context: Conte
 
         val assignment = buildVariableAssignment {
             source = baseSource
-            safe = false
             rValue = value
             calleeReference = nestedAccess.calleeReference
             explicitReceiver = safeCallNonAssignment.checkedSubject.value

compiler/fir/raw-fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt

@@ -1705,7 +1705,6 @@ class RawFirBuilder(
                     return firSelector.wrapWithSafeCall(receiver)
                 }
 
-                firSelector.safe = false
                 firSelector.explicitReceiver = receiver
             }
             return firSelector