[build-presets] Eliminate the --reconfigure from the stdlib standalone presets.

With the previous commit, one can choose when to reconfigure. I have noticed
that when we reconfigure the preset, we always rebuild. So having reconfigure by
default messes with the experience of using the preset.

Author: gottesmm

utils/build-presets.ini

@@ -2057,7 +2057,6 @@ build-subdir=stdlib_RA_standalone
 release
 assertions
 
-reconfigure
 verbose-build
 
 [preset: stdlib_RA_standalone,build,test]
@@ -2074,7 +2073,6 @@ build-subdir=stdlib_RDA_standalone
 release-debuginfo
 assertions
 
-reconfigure
 verbose-build
 
 [preset: stdlib_RDA_standalone,build,test]
@@ -2091,7 +2089,6 @@ build-subdir=stdlib_DA_standalone
 debug
 assertions
 
-reconfigure
 verbose-build
 
 [preset: stdlib_DA_standalone,build,test]