[PATCH 02/25] grep/pcre2: drop needless assignment + assert() on opt->pcre2

Drop an assignment added in b65abcafc7a (grep: use PCRE v2 for
optimized fixed-string search, 2019-07-01) and the overly cautious
assert() I added in 94da9193a6e (grep: add support for PCRE v2,
2017-06-01).

There was never a good reason for this, it's just a relic from when I
initially wrote the PCREv2 support. We're not going to have confusion
about compile_pcre2_pattern() being called when it shouldn't just
because we forgot to cargo-cult this opt->pcre2 option, and "opt"
is (mostly) used for the options the user supplied, let's avoid the
pattern of needlessly assigning to it.

With my in-flight removal of PCREv1 [1] ("Remove support for v1 of the
PCRE library", 2021-01-24) there'll be even less confusion around what
we call where in these codepaths, which is one more reason to remove
this.

1. https://lore.kernel.org/git/xmqqmtwy29x8.fsf@gitster.c.googlers.com/ (local)

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 grep.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/grep.c b/grep.c
index aabfaaa4c3..816e23f17e 100644
--- a/grep.c
+++ b/grep.c

@@ -373,8 +373,6 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt
 	int patinforet;
 	size_t jitsizearg;
 
-	assert(opt->pcre2);
-
 	p->pcre2_compile_context = NULL;
 
 	/* pcre2_global_context is initialized in append_grep_pattern */

@@ -555,7 +553,6 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
 #endif
 	if (p->fixed || p->is_fixed) {
 #ifdef USE_LIBPCRE2
-		opt->pcre2 = 1;
 		if (p->is_fixed) {
 			compile_pcre2_pattern(p, opt);
 		} else {

-- 
2.30.0.284.gd98b1dd5eaa7