[LL FIR] drop global lock from compiler required annotations phase

^KT-56551

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/file/builder/LLFirLockProvider.kt

@@ -28,7 +28,6 @@ internal class LLFirLockProvider(private val checker: LLFirLazyResolveContractCh
     private val globalLock = ReentrantLock()
 
     private val implicitTypesLock = ReentrantLock()
-    private val compilerAnnotationsLock = ReentrantLock()
 
     inline fun <R> withGlobalLock(
         key: FirFile,
@@ -56,7 +55,6 @@ internal class LLFirLockProvider(private val checker: LLFirLazyResolveContractCh
     ) {
         val lock = when (phase) {
             FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE -> implicitTypesLock
-            FirResolvePhase.COMPILER_REQUIRED_ANNOTATIONS -> compilerAnnotationsLock
             else -> null
         }