picolisp: Remove patch no longer needed

packages/picolisp/src-main.c.patch

@@ -1,15 +0,0 @@
-diff -u -r ../picoLisp/src/main.c ./src/main.c
---- ../picoLisp/src/main.c	2015-11-24 02:39:50.000000000 -0500
-+++ ./src/main.c	2015-11-26 18:07:24.794312532 -0500
-@@ -834,8 +834,10 @@
-          strcpy(buf + n + 4 + strlen(nm), ".dll");
- #endif
-       }
--      if (!(h = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL))  ||  !(h = dlsym(h,p)))
-+      if (!(h = dlopen(buf, RTLD_LAZY | RTLD_GLOBAL))  ||  !(h = dlsym(h,p))) {
-+	 fprintf(stderr, "dlopen/dlsym problem: %s\n", dlerror());
-          return NO;
-+      }
-       val(x) = box(num(h));
-    }
-    return YES;