[FIR] Unmute receiver annotations tests

These tests were muted in 89f8821d. Seems they began to work after the
introduction of `FirReceiverParameter` in KT-54417.
diff --git a/analysis/analysis-api/testData/symbols/symbolByReference/functionReceiverParameter.kt b/analysis/analysis-api/testData/symbols/symbolByReference/functionReceiverParameter.kt
index 6ace32d..dfe964a 100644
--- a/analysis/analysis-api/testData/symbols/symbolByReference/functionReceiverParameter.kt
+++ b/analysis/analysis-api/testData/symbols/symbolByReference/functionReceiverParameter.kt
@@ -1,4 +1,3 @@
-// IGNORE_FIR
 annotation class ReceiverAnnotation
 @Target(AnnotationTarget.TYPE)
 annotation class ReceiverTypeAnnotation
diff --git a/analysis/analysis-api/testData/symbols/symbolByReference/propertyReceiverParameter.kt b/analysis/analysis-api/testData/symbols/symbolByReference/propertyReceiverParameter.kt
index b9212f1..23b5302 100644
--- a/analysis/analysis-api/testData/symbols/symbolByReference/propertyReceiverParameter.kt
+++ b/analysis/analysis-api/testData/symbols/symbolByReference/propertyReceiverParameter.kt
@@ -1,4 +1,3 @@
-// IGNORE_FIR
 // DO_NOT_CHECK_NON_PSI_SYMBOL_RESTORE_K1
 annotation class ReceiverAnnotation
 @Target(AnnotationTarget.TYPE)