tools: remove non-working condition

condition doesn't apply to this target type

Fixes: nodejs#47313
Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>

Author: rockdrilla

tools/v8_gypfiles/v8.gyp

@@ -1651,10 +1651,6 @@
         }, {
           'dependencies': ['gen-regexp-special-case#target'],
         }],
-        # Avoid excessive LTO
-        ['enable_lto=="true"', {
-          'ldflags': [ '-fno-lto' ],
-        }],
       ],
       'actions': [
         {