chore: remove reference for float32/pi

Author: Neerajpathak07

lib/node_modules/@stdlib/constants/float32/pi-squared/README.md

@@ -20,7 +20,7 @@ limitations under the License.
 
 # FLOAT32_PI_SQUARED
 
-> [π][@stdlib/constants/float32/pi]².
+> π².
 
 <section class="usage">
 
@@ -32,7 +32,7 @@ var FLOAT32_PI_SQUARED = require( '@stdlib/constants/float32/pi-squared' );
 
 #### FLOAT32_PI_SQUARED
 
-Square of the mathematical constant [π][@stdlib/constants/float32/pi].
+Square of the mathematical constant π.
 
 ```javascript
 var bool = ( FLOAT32_PI_SQUARED === 9.869604110717773 );
@@ -90,7 +90,7 @@ console.log( FLOAT32_PI_SQUARED );
 
 #### STDLIB_CONSTANT_FLOAT32_PI_SQUARED
 
-Macro for the square of the mathematical constant [π][@stdlib/constants/float32/pi].
+Macro for the square of the mathematical constant π.
 
 </section>