Removed outdated/incorrect subsections of contracts (#1429)

Author: LandauRaz

components/Starknet/modules/architecture-and-concepts/nav.adoc

@@ -13,8 +13,8 @@
         *** xref:smart-contracts/contract-address.adoc[Contract address]
         *** xref:smart-contracts/contract-storage.adoc[Contract storage]
         *** xref:smart-contracts/contract-abi.adoc[Contract ABI]
-        *** xref:smart-contracts/starknet-events.adoc[Events]
-        *** xref:smart-contracts/contract-syntax.adoc[Migrating a contract from Cairo v1 to Cairo v2]
+        // *** xref:smart-contracts/starknet-events.adoc[Events]
+        // *** xref:smart-contracts/contract-syntax.adoc[Migrating a contract from Cairo v1 to Cairo v2]
         *** xref:smart-contracts/cairo-and-sierra.adoc[Cairo and Sierra]
         *** xref:smart-contracts/cairo-builtins.adoc[Cairo builtins]
         *** xref:smart-contracts/serialization-of-cairo-types.adoc[Serialization of Cairo types]
@@ -33,4 +33,4 @@
     ** xref:economics-of-starknet.adoc[Tokenomics]
     ** Transactions
         *** xref:network-architecture/transaction-life-cycle.adoc[Transaction lifecycle]
-        *** xref:network-architecture/transactions.adoc[Transaction types]
+        *** xref:network-architecture/transactions.adoc[Transaction types]