Renaming and preparing to remove oracles (#985)

A few references to oracles still remain, but they have been removed as a feature, at least.

Reviewed-on: #985
Reviewed-by: Ulf Wiger <ulfwiger@qpq.swiss>
Co-authored-by: Craig Everett <zxq9@zxq9.com>
Co-committed-by: Craig Everett <zxq9@zxq9.com>

test/contracts/events.aes

@@ -11,8 +11,6 @@ contract Events =
   type ix5 = hash // bytes(32)
   type ix6 = address
   type ix7 = Remote
-  type ix8 = oracle(int, int)
-  type ix9 = oracle_query(int, int)
 
   // Valid payload types
   type data1 = string
@@ -26,7 +24,6 @@ contract Events =
     | Nodata3(ix4, ix5, ix6)
     | Data0(data1)
     | Data1(data2, ix7)
-    | Data2(ix8, data3, ix9)
     | Data3(ix1, ix2, ix5, data1)
 
   entrypoint nodata0()                   = Chain.event(Nodata0)
@@ -35,6 +32,5 @@ contract Events =
   entrypoint nodata3(ix4, ix5, ix6)      = Chain.event(Nodata3(ix4, ix5, ix6))
   entrypoint data0(data1)                = Chain.event(Data0(data1))
   entrypoint data1(data2, ix7)           = Chain.event(Data1(data2, ix7))
-  entrypoint data2(ix8, data3, ix9)      = Chain.event(Data2(ix8, data3, ix9))
   entrypoint data3(ix1, ix2, ix5, data1) = Chain.event(Data3(ix1, ix2, ix5, data1))