build: remove armv6 from experimental platforms

Signed-off-by: Renegade334 <contact.9a5d6388@renegade334.me.uk>
PR-URL: #63063
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

Author: Renegade334

BUILDING.md

@@ -111,7 +111,6 @@ platforms. This is true regardless of entries in the table below.
 | GNU/Linux        | x86              | kernel >= 3.10, glibc >= 2.17     | Experimental | Downgraded as of Node.js 10                    |
 | GNU/Linux        | arm64            | kernel >= 4.18[^1], glibc >= 2.28 | Tier 1       | e.g. Ubuntu 20.04, Debian 10, RHEL 8           |
 | GNU/Linux        | armv7            | kernel >= 4.18[^1], glibc >= 2.28 | Experimental | Downgraded as of Node.js 24                    |
-| GNU/Linux        | armv6            | kernel >= 4.14, glibc >= 2.24     | Experimental | Downgraded as of Node.js 12                    |
 | GNU/Linux        | ppc64le >=power9 | kernel >= 4.18[^1], glibc >= 2.28 | Tier 2       | e.g. Ubuntu 20.04, RHEL 8                      |
 | GNU/Linux        | s390x >=z14      | kernel >= 4.18[^1], glibc >= 2.28 | Tier 2       | e.g. RHEL 8                                    |
 | GNU/Linux        | loong64          | kernel >= 5.19, glibc >= 2.36     | Experimental |                                                |

configure.py

@@ -1669,12 +1669,6 @@ def is_arch_armv7():
   return cc_macros_cache.get('__ARM_ARCH') == '7'
 
 
-def is_arch_armv6():
-  """Check for ARMv6 instructions"""
-  cc_macros_cache = cc_macros()
-  return cc_macros_cache.get('__ARM_ARCH') == '6'
-
-
 def is_arm_hard_float_abi():
   """Check for hardfloat or softfloat eabi on ARM"""
   # GCC versions 4.6 and above define __ARM_PCS or __ARM_PCS_VFP to specify
@@ -1758,7 +1752,7 @@ def configure_arm(o):
     arm_fpu = 'vfpv3'
     o['variables']['arm_version'] = '7'
   else:
-    o['variables']['arm_version'] = '6' if is_arch_armv6() else 'default'
+    o['variables']['arm_version'] = 'default'
 
   o['variables']['arm_thumb'] = 0      # -marm
   o['variables']['arm_float_abi'] = arm_float_abi