diff --git a/unicode/bidi/gen_trieval.go b/unicode/bidi/gen_trieval.go
index eac0f76..d565b7c 100644
--- a/unicode/bidi/gen_trieval.go
+++ b/unicode/bidi/gen_trieval.go
@@ -42,18 +42,6 @@
 	unknownClass = ^Class(0)
 )
 
-var controlToClass = map[rune]Class{
-	0x202D: LRO, // LeftToRightOverride,
-	0x202E: RLO, // RightToLeftOverride,
-	0x202A: LRE, // LeftToRightEmbedding,
-	0x202B: RLE, // RightToLeftEmbedding,
-	0x202C: PDF, // PopDirectionalFormat,
-	0x2066: LRI, // LeftToRightIsolate,
-	0x2067: RLI, // RightToLeftIsolate,
-	0x2068: FSI, // FirstStrongIsolate,
-	0x2069: PDI, // PopDirectionalIsolate,
-}
-
 // A trie entry has the following bits:
 // 7..5  XOR mask for brackets
 // 4     1: Bracket open, 0: Bracket close
diff --git a/unicode/bidi/trieval.go b/unicode/bidi/trieval.go
index 4c459c4..6a796e2 100644
--- a/unicode/bidi/trieval.go
+++ b/unicode/bidi/trieval.go
@@ -37,18 +37,6 @@
 	unknownClass = ^Class(0)
 )
 
-var controlToClass = map[rune]Class{
-	0x202D: LRO, // LeftToRightOverride,
-	0x202E: RLO, // RightToLeftOverride,
-	0x202A: LRE, // LeftToRightEmbedding,
-	0x202B: RLE, // RightToLeftEmbedding,
-	0x202C: PDF, // PopDirectionalFormat,
-	0x2066: LRI, // LeftToRightIsolate,
-	0x2067: RLI, // RightToLeftIsolate,
-	0x2068: FSI, // FirstStrongIsolate,
-	0x2069: PDI, // PopDirectionalIsolate,
-}
-
 // A trie entry has the following bits:
 // 7..5  XOR mask for brackets
 // 4     1: Bracket open, 0: Bracket close