Make examples folder somewhat more focused

examples/hello.c

@@ -10,13 +10,6 @@
 #include "libc/stdio/stdio.h"
 
 int main() {
-  /*
-   * Cosmopolitan's "Hello World" demonstrates a best practice.
-   *
-   * Since we conditionally link heavyweight features based on which
-   * characters are present in the format string, it's a good idea to
-   * have that string consist solely of directives.
-   */
   printf("%s\n", "hello world");
   return 0;
 }