tests: remove unnecessary Cwd imports

tests/build-products.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 
 my %ctx = test_init();

tests/evaluate-basic.t

@@ -1,6 +1,5 @@
 use feature 'unicode_strings';
 use strict;
-use Cwd;
 use Setup;
 
 my %ctx = test_init();

tests/evaluate-dependent-jobsets.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 
 my %ctx = test_init();

tests/input-types/bzr-checkout.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/bzr.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/darcs.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/deepgit.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/git-rev.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/git.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/hg.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/svn-checkout.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/input-types/svn.t

@@ -1,5 +1,4 @@
 use strict;
-use Cwd;
 use Setup;
 use TestScmInput;
 

tests/plugins/runcommand.t

@@ -1,7 +1,6 @@
 use feature 'unicode_strings';
 use strict;
 use warnings;
-use Cwd;
 use JSON;
 use Setup;