remove unnecessary styles and update readme;

Author: Cube-J

1.hello-world/3.read-video-angular/README.md

@@ -129,7 +129,6 @@ export class VideoDecodeComponent implements OnInit {
   justify-content: center;
   align-items: center;
   width: 100%;
-  /* height: 90%; */
   border: 1px solid black
 }
 ```
@@ -194,7 +193,7 @@ export class ImgDecodeComponent implements OnInit {
     <h1>Hello World for Angular<img style="height: 25px;" alt="logo" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNTAgMjUwIj4KICAgIDxwYXRoIGZpbGw9IiNERDAwMzEiIGQ9Ik0xMjUgMzBMMzEuOSA2My4ybDE0LjIgMTIzLjFMMTI1IDIzMGw3OC45LTQzLjcgMTQuMi0xMjMuMXoiIC8+CiAgICA8cGF0aCBmaWxsPSIjQzMwMDJGIiBkPSJNMTI1IDMwdjIyLjItLjFWMjMwbDc4LjktNDMuNyAxNC4yLTEyMy4xTDEyNSAzMHoiIC8+CiAgICA8cGF0aCAgZmlsbD0iI0ZGRkZGRiIgZD0iTTEyNSA1Mi4xTDY2LjggMTgyLjZoMjEuN2wxMS43LTI5LjJoNDkuNGwxMS43IDI5LjJIMTgzTDEyNSA1Mi4xem0xNyA4My4zaC0zNGwxNy00MC45IDE3IDQwLjl6IiAvPgogIDwvc3ZnPg=="
         />
     </h1>
-    <div class="btn-group">
+    <div>
         <button [ngStyle]="{'margin-right': '10px', 'background-color': bShowScanner ? 'rgb(255,174,55)' : 'white'}" (click)="showScanner()">Video Decode</button>
         <button [ngStyle]="{'background-color': !bShowScanner ? 'rgb(255,174,55)' : 'white'}" (click)="showImgDecode()">Image Decode</button>
     </div>
@@ -213,7 +212,6 @@ export class ImgDecodeComponent implements OnInit {
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  overflow: hidden;
   width: 100%;
   height: 100%;
   color: #455A64;
@@ -227,19 +225,8 @@ button {
   color: black;
 }
 
-span {
-  font-size: 0.8rem;
-}
-
-.bigger {
-  font-size: large;
-  margin-bottom: 2%;
-}
-
 .container {
   margin: 2vmin auto;
-  text-align: center;
-  font-size: medium;
   height: 70vh;
   width: 80vw;
 }

1.hello-world/3.read-video-angular/src/app/hello-world/hello-world.component.css

@@ -3,7 +3,6 @@
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  overflow: hidden;
   width: 100%;
   height: 100%;
   color: #455A64;
@@ -17,19 +16,8 @@ button {
   color: black;
 }
 
-span {
-  font-size: 0.8rem;
-}
-
-.bigger {
-  font-size: large;
-  margin-bottom: 2%;
-}
-
 .container {
   margin: 2vmin auto;
-  text-align: center;
-  font-size: medium;
   height: 70vh;
   width: 80vw;
 }

1.hello-world/3.read-video-angular/src/app/hello-world/hello-world.component.html

@@ -2,7 +2,7 @@
   <h1>Hello World for Angular<img style="height: 25px;" alt="logo" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNTAgMjUwIj4KICAgIDxwYXRoIGZpbGw9IiNERDAwMzEiIGQ9Ik0xMjUgMzBMMzEuOSA2My4ybDE0LjIgMTIzLjFMMTI1IDIzMGw3OC45LTQzLjcgMTQuMi0xMjMuMXoiIC8+CiAgICA8cGF0aCBmaWxsPSIjQzMwMDJGIiBkPSJNMTI1IDMwdjIyLjItLjFWMjMwbDc4LjktNDMuNyAxNC4yLTEyMy4xTDEyNSAzMHoiIC8+CiAgICA8cGF0aCAgZmlsbD0iI0ZGRkZGRiIgZD0iTTEyNSA1Mi4xTDY2LjggMTgyLjZoMjEuN2wxMS43LTI5LjJoNDkuNGwxMS43IDI5LjJIMTgzTDEyNSA1Mi4xem0xNyA4My4zaC0zNGwxNy00MC45IDE3IDQwLjl6IiAvPgogIDwvc3ZnPg=="
       />
   </h1>
-  <div class="btn-group">
+  <div>
       <button [ngStyle]="{'margin-right': '10px', 'background-color': bShowScanner ? 'rgb(255,174,55)' : 'white'}" (click)="showScanner()">Video Decode</button>
       <button [ngStyle]="{'background-color': !bShowScanner ? 'rgb(255,174,55)' : 'white'}" (click)="showImgDecode()">Image Decode</button>
   </div>

1.hello-world/3.read-video-angular/src/app/img-decode/img-decode.component.css

@@ -3,6 +3,5 @@
   justify-content: center;
   align-items: center;
   width: 100%;
-  /* height: 90%; */
   border: 1px solid black
 }