Remove debug locale

[phidebian]

Commit 08d52eb introduce 9 errors in the QA suite on

• ubuntu 24.04 LTS
• ubuntu 26.04 LTS

test locale begins at 2026-08-30+07:11:31
	locale.sh[51]: FAIL: ${x#??}: expected 'c<3d|\>e', got '2b|>c<3d|\>e'
	locale.sh[51]: FAIL: ${x: -2:1}: expected '<3d|\>', got '>'
	locale.sh[51]: FAIL: ${x:1:1}: expected '<2b|>', got '<'
	locale.sh[51]: FAIL: ${x:1:3}: expected '<2b|>c<3d|\>', got '<2b'
	locale.sh[51]: FAIL: ${x:3:1}: expected '<3d|\>', got 'b'
	locale.sh[51]: FAIL: ${x:4:1}: expected 'e', got '|'
/d1/ksh-latest/arch/linux.i386-64/dyn/bin/ksh[1]: (debug,(null),libshell,1z: cannot open) [No such file or directory]
	locale.sh[276]: FAIL: ${#x} not working with multibyte locales
/d1/ksh-latest/arch/linux.i386-64/dyn/bin/ksh: (debug,(null),libshell,2A@: cannot open) [No such file or directory]
/d1/ksh-latest/arch/linux.i386-64/dyn/bin/ksh: (debug,(null),libshell,2A@: cannot open) [No such file or directory]
	locale.sh[313]: FAIL: multibyte debug locale $a<2A@>z failed -- expected '123', got ''
	locale.sh[367]: FAIL: character length of multibyte character should be 3
	locale.sh[446]: warning: ja_JP locale or gencat not available - skipping issue 599 test

Since this is locale, it may be my setup, but yet with my setup is unmodified between runs, it is suspicious.

Cheers,

[McDutchie]

Thanks, I'm aware, this is happening everywhere since 08d52eb. AST's internal debug locale violates the assumption that multibyte characters never start with ASCII bytes. I will fix this problem by removing the debug locale, which I've never found useful anyway.