Remove obsolete mx_BetaDot style rules introduced for Space release (#10286)

Signed-off-by: Suguru Hirahara <[email protected]>

Author: luixxiul

res/css/structures/_SpacePanel.pcss

@@ -111,12 +111,6 @@ $activeBorderColor: $primary-content;
 
     .mx_SpaceItem_new {
         position: relative;
-
-        .mx_BetaDot {
-            position: absolute;
-            left: 33px;
-            top: -5px;
-        }
     }
 
     .mx_SpaceItem:not(.hasSubSpaces) > .mx_SpaceButton {

res/css/views/beta/_BetaCard.pcss

@@ -137,64 +137,3 @@ limitations under the License.
         cursor: pointer;
     }
 }
-
-$pulse-color: $accent-alt;
-$dot-size: 12px;
-
-.mx_BetaDot {
-    border-radius: 50%;
-    margin: 10px;
-    height: $dot-size;
-    width: $dot-size;
-    transform: scale(1);
-    background: rgba($pulse-color, 1);
-    animation: mx_Beta_bluePulse 2s infinite;
-    animation-iteration-count: 20;
-    position: relative;
-    pointer-events: none;
-
-    &::after {
-        content: "";
-        position: absolute;
-        width: inherit;
-        height: inherit;
-        top: 0;
-        left: 0;
-        transform: scale(1);
-        transform-origin: center center;
-        animation-name: mx_Beta_bluePulse_shadow;
-        animation-duration: inherit;
-        animation-iteration-count: inherit;
-        border-radius: 50%;
-        background: rgba($pulse-color, 1);
-    }
-}
-
-@keyframes mx_Beta_bluePulse {
-    0% {
-        transform: scale(0.95);
-    }
-
-    70% {
-        transform: scale(1);
-    }
-
-    100% {
-        transform: scale(0.95);
-    }
-}
-
-@keyframes mx_Beta_bluePulse_shadow {
-    0% {
-        opacity: 0.7;
-    }
-
-    70% {
-        transform: scale(2.2);
-        opacity: 0;
-    }
-
-    100% {
-        opacity: 0;
-    }
-}