Update Usage.md

Author: zkToha

Documentation/Usage.md

@@ -297,7 +297,6 @@ print("w3s token balance = " + String(bal))
 
 ## Transactions Operations
 
-
 ### Prepare Transaction
 
 #### The class created to bound provider
@@ -461,20 +460,6 @@ func contract(for address: String, web3: web3) -> web3.web3contract? {
 }
 ```
 
-#### Setting Transaction Options
-
-```swift
-var options = Web3Options.defaultOptions()
-    // public var to: EthereumAddress? = nil - to what address transaction is aimed
-    // public var from: EthereumAddress? = nil - form what address it should be sent (either signed locally or on the node)
-    // public var gasLimit: BigUInt? = BigUInt(90000) - default gas limit
-    // public var gasPrice: BigUInt? = BigUInt(5000000000) - default gas price, quite small
-    // public var value: BigUInt? = BigUInt(0) - amount of WEI sent along the transaction
-options.gasPrice = gasPrice
-options.gasLimit = gasLimit
-options.from = EthereumAddress("0xE6877A4d8806e9A9F12eB2e8561EA6c1db19978d")
-```
-
 #### Preparing Transaction For Sending Ether
 
 ```swift
@@ -737,14 +722,6 @@ public func sendToContract(transaction: TransactionIntermediate,
 }
 ```
 
-### Get Transaction Gas Price
-
-```swift
-let web3Main = Web3.InfuraMainnetWeb3()
-let gasPriceResult = web3Main.eth.getGasPrice()
-guard case .success(let gasPrice) = gasPriceResult else {return}
-```
-
 ## Chain state
 
 ### Get Block number