gh-35738: configure: Remove stray stdin.info file created in test

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### 📚 Description

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Removes `stdin.info` generated by configure -
https://groups.google.com/g/sage-release/c/4qxkufg2l6Y/m/24oPdOL-FQAJ
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URL: #35738
Reported by: Matthias Köppe
Reviewer(s): Dima Pasechnik

Author: Release Manager

build/pkgs/configure/checksums.ini

@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=05ff783186ba44f6afec3fad5fecea42acb32db6
-md5=ecd17bd2d001b1c17586fa7877550bf9
-cksum=1852648534
+sha1=efa52d2db3a67f4aba3f94cd83df9d0b9dd29f06
+md5=dedcc422a192b5d38a30940953f6c77a
+cksum=3828425183

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-17aa7f7ea5b8522f028ef5a87613f1979978a748
+7fa8fbbef164382770f0f5e6611a75b6459a78eb

build/pkgs/info/spkg-configure.m4

@@ -9,6 +9,7 @@ SAGE_SPKG_CONFIGURE([info], [
         AS_IF([makeinfo -c foo 2>&1 | grep -q invalid], [
          dnl makeinfo found, but too old, and  does not support all options that ecl likes to use
          sage_spkg_install_info=yes])
+        rm -f stdin.info
        ])
     ])
 ])