Revert "mkdocs.yml: Add syntax highlighting (#89)"

This reverts commit 7aebfc652c.

courses/security/fundamentals.md

@@ -42,7 +42,7 @@
   - Fail securely
     - Applications regularly fail to process transactions for many reasons. How they fail can determine if an application is secure or not.
 
-    ```java
+    ```
 
     is_admin =  true;
     try {
@@ -113,7 +113,7 @@
 
 - Ciphers are the cornerstone of cryptography. A cipher is a set of algorithms that performs encryption or decryption on a message. An encryption algorithm (E) takes a secret key (k) and a message (m) and produces a ciphertext (c). Similarly, a Decryption algorithm (D) takes a secret key (K) and the previous resulting Ciphertext (C). They are represented as follows:
 
-```text
+```
 
 E(k,m) = c
 D(k,c) = m
@@ -122,7 +122,7 @@ D(k,c) = m
 
 - This also means that for it to be a cipher, it must satisfy the consistency equation as follows, making it possible to decrypt.
 
-```text
+```
 
 D(k,E(k,m)) = m
 ```

courses/security/network_security.md

@@ -142,7 +142,7 @@ Let us see how we keep a check on the perimeter i.e the edges, the first layer o
 - Nmap is often used to determine alive hosts in a network, open ports on those hosts, services running on those open ports, and version identification of that service on that port.
 - More at http://scanme.nmap.org/
 
-```bash
+```
 nmap [scan type] [options] [target specification]
 ```
 
@@ -417,7 +417,7 @@ TCP Flags
 
   - Abuse of the normal operation or settings of these flags can be used by attackers to launch DoS attacks. This causes network servers or web servers to crash or hang.
 
-```text
+```
 | SYN  | FIN  | PSH   | RST  | Validity|  
 |------|------|-------|------|---------|
 | 1    |1     |0      |0     |Illegal Combination

courses/security/threats_attacks_defences.md

@@ -100,7 +100,7 @@ BGP Security
 - A successful exploit will allow attackers to access, modify, or delete information in the database.
 - It permits attackers to steal sensitive information stored within the backend databases of affected websites, which may include such things as user credentials, email addresses, personal information, and credit card numbers
 
-```sql
+```
 SELECT USERNAME,PASSWORD from USERS where USERNAME='<username>' AND PASSWORD='<password>';
 
 Here the username & password is the input provided by the user. Suppose an attacker gives the input as " OR '1'='1'" in both fields. Therefore the SQL query will look like: