docs: rm unused badges

Author: maksyuki

README.md

@@ -1,20 +1,5 @@
 # TIMER
 
-<p>
-    <a href=".">
-      <img src="https://img.shields.io/badge/RTL%20dev-done-green?style=flat-square">
-    </a>
-    <a href=".">
-      <img src="https://img.shields.io/badge/VCS%20sim-done-green?style=flat-square">
-    </a>
-    <a href=".">
-      <img src="https://img.shields.io/badge/FPGA%20verif-no%20start-wheat?style=flat-square">
-    </a>
-    <a href=".">
-      <img src="https://img.shields.io/badge/Tapeout%20test-no%20start-wheat?style=flat-square">
-    </a>
-</p>
-
 ## Features
 * Programmable prescaler
     * max division factor is up to 2^20
@@ -34,6 +19,8 @@
 * Static synchronous design
 * Full synthesizable
 
+FULL vision of datatsheet can be found in [datasheet.md](./doc/datasheet.md).
+
 ## Build and Test
 ```bash
 make comp    # compile code with vcs