refactor: delete duplicate utf8-functionality

Also remove British National Replacement Character Set.

We keep the DEC Special Graphics and ASCII despite it not being unicode
as some old software such as calcurse still rely on this functionality.

References:
- https://github.com/neovim/neovim/pull/31934#discussion_r1911046426
- https://en.wikipedia.org/wiki/DEC_Special_Graphics
- https://vt100.net/docs/vt220-rm/chapter2.html#S2.4.3

1 files changed, 1 insertions, 8 deletions

diff --git a/src/nvim/vterm/encoding.c b/src/nvim/vterm/encoding.c
index cc3208cfa2..f9061e8e50 100644
--- a/src/nvim/vterm/encoding.c
+++ b/src/nvim/vterm/encoding.c
@@ -210,6 +210,7 @@ static void decode_table(VTermEncoding *enc, void *data, uint32_t cp[], int *cpi
   }
 }
 
+// https://en.wikipedia.org/wiki/DEC_Special_Graphics
 static const struct StaticTableEncoding encoding_DECdrawing = {
   { .decode = &decode_table },
   {
@@ -247,13 +248,6 @@ static const struct StaticTableEncoding encoding_DECdrawing = {
   }
 };
 
-static const struct StaticTableEncoding encoding_uk = {
-  { .decode = &decode_table },
-  {
-    [0x23] = 0x00a3,  // £
-  }
-};
-
 static struct {
   VTermEncodingType type;
   char designation;
@@ -262,7 +256,6 @@ static struct {
 encodings[] = {
   { ENC_UTF8,      'u', &encoding_utf8 },
   { ENC_SINGLE_94, '0', (VTermEncoding *)&encoding_DECdrawing },
-  { ENC_SINGLE_94, 'A', (VTermEncoding *)&encoding_uk },
   { ENC_SINGLE_94, 'B', &encoding_usascii },
   { 0 },
 };