X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fsubstitution%2Fdrop.ma;h=c60891d611714254628e335a9a4b2d37f74b7a5d;hb=c2211ba58807254e75c6321cbd688db462d80fd2;hp=32b00b4bc5bf1bf1f72d99b802d3d928e1e0598c;hpb=d8ddeb030acbf2246693dc0b65c321ee39e4328b;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/substitution/drop.ma b/matita/matita/contribs/lambdadelta/basic_2/substitution/drop.ma
index 32b00b4bc..c60891d61 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/substitution/drop.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/substitution/drop.ma
@@ -12,7 +12,6 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "ground_2/lib/bool.ma".
 include "ground_2/lib/lstar.ma".
 include "basic_2/notation/relations/rdrop_5.ma".
 include "basic_2/notation/relations/rdrop_4.ma".