lib-gpg: drop unnecessary "missing GPG" warning

When 37d3e85 (t7004: factor out gpg setup, 2011-09-07) pulled gpg
detection code out of t7004-tag.sh and turned it into a standard test
prerequisite, it added an unconditional "missing GPG" warning when gpg
is not detected.

However, this is redundant since all tests which require GPG already
warn via either 'test_expect_success GPG' ("skipping: missing GPG") on a
test-by-test basis, or when skipping all tests in a script ("skipping
all foobar tests; missing GPG").  Consequently, the extra warning from
lib-gpg.sh is unnecessary, so retire it.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/lib-gpg.sh

@@ -1,9 +1,8 @@
 #!/bin/sh
 
 gpg_version=$(gpg --version 2>&1)
-if test $? = 127; then
-	say "You do not seem to have gpg installed"
-else
+if test $? != 127
+then
 	# As said here: http://www.gnupg.org/documentation/faqs.html#q6.19
 	# the gpg version 1.0.6 didn't parse trust packets correctly, so for
 	# that version, creation of signed tags using the generated key fails.