docs: removed unnecessary 'not yet implemneted' marks from interface …

…docs

internal-docs/basic-interfaces.md

@@ -59,7 +59,7 @@ The `AudioContext` interface is the underlying audio context that manages the st
 &ensp;**`getCurrentTime()`**<br>
 &ensp;&ensp;&ensp;*Returns a floating point number representing an ever-increasing hardware time in seconds. It starts at 0.*
 
-&ensp;**`close()`**:exclamation: not yet implemented :exclamation:<br>
+&ensp;**`close()`**<br>
 &ensp;&ensp;&ensp;*Closes audio context, releasing any system resources that it uses.*
 
 #### Code snippets
@@ -272,7 +272,7 @@ panner.pan.value = -0.5;
 
 ---
 
-### BiquadFilterNode :exclamation: not yet implemented :exclamation:
+### BiquadFilterNode 
 
 The `BiquadFilterNode` interface represents a simple low-order filter. It can represent different kinds of filters, tone control devices, and graphic equalizers