diff --git a/extra/DSA/matrix-cube.c b/extra/DSA/matrix-cube.c
index 25fdaa3..27d8f4b 100644
--- a/extra/DSA/matrix-cube.c
+++ b/extra/DSA/matrix-cube.c
@@ -211,17 +211,6 @@ unsigned solve_mat(unsigned c, unsigned r) {
 	return 0;
 }
 
-void skip_lines(FILE * fd, unsigned num) {
-	for (unsigned i = 0; i < num; ++i) {
-		fscanf(fd, "%*[^\n]\n", NULL);
-	}
-}
-
-void fatal(const char * msg) {
-	fprintf(stderr, "%s\n", msg);
-	exit(1);
-}
-
 int main(void) {
 
 	make_exit_cell(&testM[3][3]);
diff --git a/extra/DSA/product-browser.c b/extra/DSA/product-browser.c
index 1e80c2f..838ec6d 100644
--- a/extra/DSA/product-browser.c
+++ b/extra/DSA/product-browser.c
@@ -1,4 +1,3 @@
-//razvan.cioarga@cs.upt.ro
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>