3 files changed, 6 insertions, 8 deletions
diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h
index 33903df0be39..ce78a02aefbb 100644
--- a/absl/strings/internal/str_format/extension.h
+++ b/absl/strings/internal/str_format/extension.h
@@ -143,7 +143,7 @@ struct Flags {
 // clang-format off
 #define ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, X_SEP) \
   /* text */ \
-  X_VAL(c) X_SEP X_VAL(C) X_SEP X_VAL(s) X_SEP X_VAL(S) X_SEP \
+  X_VAL(c) X_SEP X_VAL(s) X_SEP \
   /* ints */ \
   X_VAL(d) X_SEP X_VAL(i) X_SEP X_VAL(o) X_SEP \
   X_VAL(u) X_SEP X_VAL(x) X_SEP X_VAL(X) X_SEP \
@@ -170,7 +170,7 @@ struct FormatConversionCharInternal {
  private:
   // clang-format off
   enum class Enum : uint8_t {
-    c, C, s, S,              // text
+    c, s,                    // text
     d, i, o, u, x, X,        // int
     f, F, e, E, g, G, a, A,  // float
     n, p,                    // misc
@@ -444,7 +444,7 @@ class FormatConversionSpec {
 
 // clang-format off
 enum class FormatConversionChar : uint8_t {
-  c, C, s, S,              // text
+  c, s,                    // text
   d, i, o, u, x, X,        // int
   f, F, e, E, g, G, a, A,  // float
   n, p                     // misc
@@ -454,9 +454,7 @@ enum class FormatConversionChar : uint8_t {
 enum class FormatConversionCharSet : uint64_t {
   // text
   c = str_format_internal::FormatConversionCharToConvInt('c'),
-  C = str_format_internal::FormatConversionCharToConvInt('C'),
   s = str_format_internal::FormatConversionCharToConvInt('s'),
-  S = str_format_internal::FormatConversionCharToConvInt('S'),
   // integer
   d = str_format_internal::FormatConversionCharToConvInt('d'),
   i = str_format_internal::FormatConversionCharToConvInt('i'),
diff --git a/absl/strings/internal/str_format/parser.cc b/absl/strings/internal/str_format/parser.cc
index 61132739b875..cc55dfa9c74e 100644
--- a/absl/strings/internal/str_format/parser.cc
+++ b/absl/strings/internal/str_format/parser.cc
@@ -29,9 +29,9 @@ ABSL_CONST_INIT const ConvTag kTags[256] = {
     {},    {},    {},    {},    {},    {},    {},    {},     // 28-2f
     {},    {},    {},    {},    {},    {},    {},    {},     // 30-37
     {},    {},    {},    {},    {},    {},    {},    {},     // 38-3f
-    {},    CC::A, {},    CC::C, {},    CC::E, CC::F, CC::G,  // @ABCDEFG
+    {},    CC::A, {},    {},    {},    CC::E, CC::F, CC::G,  // @ABCDEFG
     {},    {},    {},    {},    LM::L, {},    {},    {},     // HIJKLMNO
-    {},    {},    {},    CC::S, {},    {},    {},    {},     // PQRSTUVW
+    {},    {},    {},    {},    {},    {},    {},    {},     // PQRSTUVW
     CC::X, {},    {},    {},    {},    {},    {},    {},     // XYZ[\]^_
     {},    CC::a, {},    CC::c, CC::d, CC::e, CC::f, CC::g,  // `abcdefg
     LM::h, CC::i, LM::j, {},    LM::l, {},    CC::n, CC::o,  // hijklmno
diff --git a/absl/strings/internal/str_format/parser_test.cc b/absl/strings/internal/str_format/parser_test.cc
index dae2d20f593e..5aced987200d 100644
--- a/absl/strings/internal/str_format/parser_test.cc
+++ b/absl/strings/internal/str_format/parser_test.cc
@@ -47,7 +47,7 @@ TEST(ConversionCharTest, Names) {
   // clang-format off
   const Expectation kExpect[] = {
 #define X(c) {FormatConversionCharInternal::c, #c[0]}
-    X(c), X(C), X(s), X(S),                          // text
+    X(c), X(s),                                      // text
     X(d), X(i), X(o), X(u), X(x), X(X),              // int
     X(f), X(F), X(e), X(E), X(g), X(G), X(a), X(A),  // float
     X(n), X(p),                                      // misc