Refactor SCSS styles in common and about templates

- Removed unused styles and nested selectors from _common.scss to streamline the code.
- Cleaned up the .about section in _about.scss by eliminating redundant styles for headings and paragraphs.
- Improved overall readability and maintainability of the SCSS files.

themes/airspace-hugo/assets/scss/_common.scss

@@ -250,35 +250,8 @@ input[type="tel"] {
 
 .title {
   padding: 20px 0 30px;
-
-  h2 {
-    font-size: 18px;
-    text-align: center;
-    text-transform: uppercase;
-    letter-spacing: 2px;
-  }
 }
 
-.section-title {
-  margin-bottom: 70px;
-
-  @include tablet {
-    margin-bottom: 20px;
-  }
-
-  h2 {
-    text-transform: uppercase;
-    font-weight: 600;
-    margin: 0px;
-    padding: 30px 0px;
-  }
-
-  p {
-    font-style: italic;
-    color: darken( $light, 57.64);
-    font-family: $font-secondary;
-  }
-}
 
 
 .section-subtitle {
@@ -303,13 +276,6 @@ input[type="tel"] {
   .block {
     text-align: center;
 
-    h1 {
-      color: $white;
-      font-weight: 200;
-      letter-spacing: 0.15em;
-      margin-top: 0;
-      text-transform: capitalize;
-    }
 
     p {
       color: $white;
@@ -321,20 +287,6 @@ input[type="tel"] {
 .heading {
   padding-bottom: 60px;
   text-align: center;
-
-  h2 {
-    color: $black;
-    font-size: 30px;
-    line-height: 40px;
-    font-weight: 400;
-  }
-
-  p {
-    font-size: 18px;
-    line-height: 40px;
-    color: lighten( $black, 16.078);
-    font-weight: 300;
-  }
 }