style: remove headings and fix comment

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/gumbel/skewness/src/main.c

@@ -18,20 +18,14 @@
 
 #include "stdlib/math/base/assert/is_nan.h"
 
-
-// VARIABLES //
-
 static const double SKEWNESS = 1.1395470994046488;
 
-
-// MAIN //
-
 /**
 * Returns the skewness for a Gumbel distribution with location `mu` and scale `beta`.
 *
 * @param mu     location parameter
 * @param beta   scale parameter
-* @returns      skewness
+* @return       skewness
 *
 * @example
 * double y = stdlib_base_dists_gumbel_skewness( 0.0, 1.0 );